.popup {

     height: 245px;
     padding: 20px;
     position: fixed;
     right: 40%;
     top: 25%;
     width: 550px;
     z-index: 101;
}

.overlay {
    background: #000000;
    bottom: 0;
    left: 0;
    position: fixed;
    right: 0;
    top: 0;
    z-index: 100;
    opacity:0.5;
    text-align: center;
}

#imgpublicidad{

  width:540px;
  z-index:10000!important;
}

#imgcancel{
  width:40px;
  z-index:10000!important;
  position:absolute;
  right:0px;
  top:10px;
}

@media (max-width: 991px) {
  #imgpublicidad{

    width:70%;
    z-index:10000!important;

  }

  .popup {

       height: 245px;
       padding: 20px;
       position: fixed;
       left: 0%;
       top: 15%;
       width: 550px;
       z-index: 101;
  }

  #imgcancel{
    width:20px;
    z-index:10000!important;
    position:absolute;
    left:65%;
    top:10px;
  }


}